According to the Radio Intel website the Redsun 2000 and 2100 are the same,
one is the export model, one is the domestic Chinese model

www.radiointel.com/oldnews.htm - scroll down to "New Models from a New
Radio Company - Redsun Electronics

Mentioned is that they will be introducing some new PLL AM/FM/SW models very
soon. The first model to be introduced is the RP2000 (export) and RP2100
(for Chinese domestic sales) . This model will featu dual conversion ,
1st IF: 55.845MHz, MCU control, 8 IC, FM/MW/SW1/2/3, FM/SW external antenna
terminal, MW external antenna terminal (500 ohm), AM IF output for
CW/SSB/DRM/SSTV, Narrow/Wide/RF Gain, Stereo earphone output, Line out and a
5-inch speaker.